Are you trying to post it on your page and it's not working?
Or is the entire code not working? (Looking at it now)

You have liked this post!

I posted the link for it on my page:
<*link rel="stylesheet" type="text/css" href="" />
(But without the *). If you'll look at my den you'll notice there's no difference.

You have liked this post!

Looking at the link in the above post, and the one in the OP, they're different and the second one fails.

Try this:
<link rel="stylesheet" type="text/css" href="https://dl.dropboxusercontent.com/s/jnzxdu7ap9d1dd5/tranquilforest.css?dl=0" />

You have liked this post!

Sorry, the link in the post must be wrong. I'll change it.
(Edit: fixed link)

You have liked this post!

So sorry about that.

You have liked this post!

The updated link doesn't look like a stylesheet

It contains a path name for your computer though, which has your full name in the directory - just so you know.
From the looks you want to upload your "new1.css" file.

You have liked this post!

Okay, I'm obviously messing up in tons of ways here. I'm going to go through everything, making certain I have the right link, and I'll get post once that's done.

You have liked this post!

Okay, this is the new link:
https://www.dropbox.com/s/xj88xn76j1779pp/new%201.css?dl=0

You have liked this post!

<link rel="stylesheet" type="text/css" href="https://dl.dropbox.com/s/xj88xn76j1779pp/new%201.css" />

This will work

You have liked this post!

Jesus christ thank you so so much I've been trying for 24 hours!

You have liked this post!

No problem, happy to help with css! It can be a right pain

You have liked this post!